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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Microsoft.Boogie.ModelViewer
{
internal class SkeletonItem
{
readonly string name;
readonly List<SkeletonItem> children = new List<SkeletonItem>();
internal readonly IDisplayNode[] displayNodes;
internal bool[] isPrimary;
internal readonly SkeletonItem parent;
internal readonly Main main;
internal readonly int level;
internal bool expanded, wasExpanded;
internal bool isMatch;
public void Iter(Action<SkeletonItem> handler)
{
handler(this);
children.ForEach(u => u.Iter(handler));
}
public IEnumerable<SkeletonItem> RecChildren
{
get
{
if (expanded) {
foreach (var c in children) {
yield return c;
foreach (var ch in c.RecChildren)
yield return ch;
}
}
}
}
public SkeletonItem[] PopulateRoot(IEnumerable<IState> states)
{
var i = 0;
foreach (var s in states) {
displayNodes[i++] = new ContainerNode<IDisplayNode>(this.name, x => x, s.Nodes);
}
return BfsExpand(this);
}
public SkeletonItem(Main m, int stateCount)
{
name = "";
main = m;
displayNodes = new IDisplayNode[stateCount];
isPrimary = new bool[stateCount];
}
internal SkeletonItem(string n, SkeletonItem par)
: this(par.main, par.displayNodes.Length)
{
parent = par;
name = n;
level = par.level + 1;
}
public bool Expandable
{
get {
if (wasExpanded)
return children.Count > 0;
return displayNodes.Any(d => d != null && d.Children.Count() > 0);
}
}
public bool Expanded
{
get { return expanded; }
set
{
expanded = value;
if (expanded)
ComputeChildren();
}
}
static SkeletonItem[] BfsExpand(SkeletonItem skel)
{
for (int i = 0; i < skel.displayNodes.Length; ++i)
BfsExpandCore(skel, i);
var workItems = new Stack<SkeletonItem>();
var allNodes = new List<SkeletonItem>();
workItems.Push(skel);
while (workItems.Count > 0) {
var s = workItems.Pop();
if (!s.isPrimary.Any())
continue;
allNodes.Add(s);
s.children.Iter(workItems.Push);
}
return allNodes.ToArray();
}
static void BfsExpandCore(SkeletonItem skel, int idx)
{
var visited = new HashSet<Model.Element>();
var workItems = new Queue<SkeletonItem>();
workItems.Enqueue(skel);
while (workItems.Count > 0) {
var s = workItems.Dequeue();
if (s.displayNodes[idx] == null)
continue;
var e = s.displayNodes[idx].Element;
s.isPrimary[idx] = true;
if (e != null) {
if (visited.Contains(e))
continue;
visited.Add(e);
}
s.ComputeChildren();
s.children.Iter(workItems.Enqueue);
}
}
private void ComputeChildren()
{
if (wasExpanded) return;
wasExpanded = true;
var created = new Dictionary<string, SkeletonItem>();
var names = new List<IDisplayNode>();
for (int i = 0; i < displayNodes.Length; ++i) {
var dn = displayNodes[i];
if (dn == null) continue;
foreach (var child in dn.Children) {
if (child.ViewLevel > main.viewOpts.ViewLevel)
continue;
SkeletonItem skelChild;
var name = child.Name;
if (!created.TryGetValue(name, out skelChild)) {
skelChild = new SkeletonItem(child.Name, this);
created.Add(name, skelChild);
names.Add(child);
}
skelChild.displayNodes[i] = child;
}
}
foreach (var name in main.LangModel.SortFields(names)) {
children.Add(created[name]);
}
}
public bool MatchesWords(string[] words, Model.Element[] elts, Model.Element eq, int stateId)
{
var node = displayNodes[stateId];
if (node == null)
return false;
var s1 = LongName(stateId).ToLower();
var s2 = node.Value.ToLower();
if (eq != null && node.Element != eq)
return false;
foreach (var w in words) {
if (!s1.Contains(w) && !s2.Contains(w))
return false;
}
foreach (var e in elts) {
if (!node.References.Contains(e))
return false;
}
return true;
}
public string LongName(int stateId)
{
var parents = new List<IDisplayNode>();
for (var curr = this; curr != null; curr = curr.parent) {
if (curr.parent != null) // skip the root
parents.Add(curr.displayNodes[stateId]);
}
parents.Reverse();
return main.LangModel.PathName(parents);
}
public void SyncWith(Dictionary<SkeletonItem, SkeletonItem> mapping, SkeletonItem old)
{
mapping[old] = this;
Expanded = old.Expanded;
var oldCh = old.children.ToDictionary(c => c.name);
foreach (var c in children) {
SkeletonItem oc;
if (oldCh.TryGetValue(c.name, out oc))
c.SyncWith(mapping, oc);
}
}
}
}
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